Northern NSW prepares for severe storm

Thunderstorms may cause heavy rain and flash flooding over large parts of NSW, forecasters warn.Source: AAP

HEAVY rain and damaging winds are expected to lash large parts of NSW as a storm front moves north.

A severe thunderstorm warning is in place for the remainder of Christmas for the north-west slopes and plains, northern tablelands and parts of the northern rivers, mid-north coast, and upper western forecast districts.

"Severe thunderstorms are likely to produce heavy rainfall that may lead to flash flooding and damaging winds in the warning area over the next several hours," the Bureau of Meteorology said when it issued the warning at 7.35pm (AEDT) on Tuesday.

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